Application of Well Factory Drilling Technology in Shale Gas Development in the Sichuan Basin

2017 ◽  
Author(s):  
Liu Yang ◽  
Chen Ping ◽  
Ma Tian Shou
Keyword(s):  
Shale Gas ◽  
Sichuan Basin ◽  
Drilling Technology ◽  
The Sichuan Basin

scholarly journals Removal of Ca2+, Mg2+, Ba2+ and Sr2+ from shale gas flowback water from the Sichuan Basin in China by chemical softening under the guidance of OLI Stream Analyzer: precipitation behaviors and optimization study

2020 ◽  
Author(s):  
Wenshi Liu ◽  
Lingru Sun ◽  
Sha Tao
Keyword(s):  
Reverse Osmosis ◽  
Shale Gas ◽  
Sichuan Basin ◽  
System Analysis ◽  
Flowback Water ◽  
Optimization Study ◽  
Mineral Scaling ◽  
The Sichuan Basin ◽  
Reverse Osmosis Desalination ◽  
Chemical Softening

Abstract The disposal of flowback water is recognized as a key issue for the sustainable shale gas development and discharge after reasonable treatment is considered as a feasible pathway. One of the challenges during treatment is the severe mineral scaling potential in reverse osmosis desalination, especially with high amounts of Ca2+, Mg2+, Ba2+ and Sr2+ in flowback water. In this study, precipitation behaviors of Ca2+, Mg2+, Ba2+ and Sr2+ during traditional chemical softening was evaluated so as to achieve optimal chemical dosage. Both jar tests and OLI Stream Analyzer simulation revealed that the main precipitates were CaCO3, SrCO3 and BaSO4 during Na2CO3 addition, and Ba2+ could not be removed efficiently by Na2CO3 unless a high dosage was applied since Ba2+ would react after the precipitation of Ca2+ and Sr2+. Reverse Osmosis System Analysis simulation indicated that Ba2+ was a concern because Ba2+ would form tenacious BaSO4 scale on the reverse osmosis membranes. Finally, the Na2SO4-NaOH-Na2CO3 process was proposed for chemical softening as it has a high removal efficiency and low chemical cost. Overall, this study presents an effective chemical softening method and OLI Stream Analyzer could serve as a reliable tool for the calculation, which would finally improve the design and operation of shale gas flowback water treatment.

Remagnetization of lower Silurian black shale and insights into shale gas in the Sichuan Basin, south China

2016 ◽  
Vol 121 (2) ◽  
pp. 491-505 ◽  
Author(s):  
Yong Zhang ◽  
Dong Jia ◽  
Hongwei Yin ◽  
Mancang Liu ◽  
Wuren Xie ◽  
...  
Keyword(s):  
Black Shale ◽  
South China ◽  
Shale Gas ◽  
Sichuan Basin ◽  
Lower Silurian ◽  
The Sichuan Basin
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